Viatalk and Elastix 1.5.2 Trunk will not register

I have a viatalk Sip trunk set up on a trixbox CE 2.6.2 Server that register just fine, i copied the same exact Trunk setting to New Elastix install that thing will not register. I can't make or receive any calls.
I have done everything that i could think of so please any Help will be greatly appreciated.